Ruthenium Acetylide Oxidation: From Stable Radicals to Allenylidene Synthesis via -Elimination of H+ - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Organometallics Année : 2002

Ruthenium Acetylide Oxidation: From Stable Radicals to Allenylidene Synthesis via -Elimination of H+

Résumé

Oxidation of ruthenium(II) acetylides trans-[Cl(dppe)2Ru-CC-CHR2] (R = H, CH3, Ph) leads to cationic radicals of which the stability is found to be highly influenced by the nature of R. This oxidative process leads to a stable cationic radical (R = CH3, H) or to its rearrangement into a neutral radical, trans-[Cl(dppe)2Ru-CC-C(R)2] for R = Ph. This unprecedented -elimination of a proton provides both the allenylidene trans-[Cl(dppe)2Ru=C=C=CR2]PF6 and the vinylidene trans-[Cl(dppe)2Ru=C=CH-CHR2]PF6. The allenylidene can be selectively obtained from the acetylide in the presence of a base

Domaines

Chimie organique

Dates et versions

hal-00164262 , version 1 (19-07-2007)

Identifiants

Citer

Florian Monnier, Stephane Rigaut, Francois Mousset, Daniel Touchard, Pierre H. Dixneuf. Ruthenium Acetylide Oxidation: From Stable Radicals to Allenylidene Synthesis via -Elimination of H+. Organometallics, 2002, 21 (13), pp.2654 -2661. ⟨10.1021/om0200555⟩. ⟨hal-00164262⟩
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